『IOS』Property with 'retain (or strong)' attribute must be of object type

转载于 2014-08-14 16:28:55 发布 · 1.6k 阅读

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本文介绍如何解决AFNetworking2.0在DeploymentTarget低于6.0时遇到的dispatch_queue_t属性错误问题，通过条件编译实现不同版本SDK间的兼容。

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AFNetworking 2.0 当Deployment Target 低于6.0时，AFURLConnectionOperation.h,AFURLSessionManager.h

@property (nonatomic, strong) dispatch_queue_t completionQueue;

由于sdk低于6.0时，dispatch_queue_t ARC没有托管，出现提示错误

 Property with 'retain (or strong)' attribute must be of object type

修改为

#if OS_OBJECT_USE_OBJC
@property (nonatomic, strong) dispatch_queue_t completionQueue;
#else
@property (nonatomic, assign) dispatch_queue_t completionQueue;
#endif

『IOS』Property with &#39;retain (or strong)&#39; attribute must be of object type

『IOS』Property with 'retain (or strong)' attribute must be of object type